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Multiplication of Decimals

In this worksheet, students multiply decimal numbers.

'Multiplication of Decimals' worksheet

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Four Operations for All Numbers

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this worksheet, we will be multiplying decimal numbers.

 

Examples

When multiplying decimal numbers, you adjust the decimal number by multiplying it by 10 or 100 to convert it into a whole number. Then you carry out the multiplication.  Finally you re-adjust  your answer by dividing by 10 or 100 to convert them back into decimals.

 

7.35 × 31

Multiply 7.35 by 100 to get 735.

Work out 735 x 31 = 22785

Divide this by 100 to get the answer 227.85

 

2.7 × 41.2

Multiply 2.7 by 10 to get 27 and 41.2 by 10 get 412

Work out 27 x 412 = 11124

Divide this by 10 x 10 = 100 to get the answer 111.24

Work out:

2.5 × 12 = _________

 

Work out:

2.44 × 20 = _________

 

Calculate:

9.76 × 45 = _________

 

Work out:

6.8 × 1.2 = _________

 

Calculate:

1.94 × 2.1 = _________

 

Work out:

9.08 × 908 = _________

 

Work out:

4.11 × 4.1 = _________

 

Calculate:

5.05 × 505 = _________

Work out:

3.04 × 304 = _________

 

Calculate:

3.04 × 3.04 = _________

 

  • Question 1

Work out:

2.5 × 12 = _________

 

CORRECT ANSWER
30
EDDIE SAYS

Multiply 2.5 by 10 to get 25

Multiply 12 by 10 to get

 

25 x 12 = 300

 

Divide 300 by 10 to get 30

  • Question 2

Work out:

2.44 × 20 = _________

 

CORRECT ANSWER
48.8
EDDIE SAYS

Multiply 2.5 by 10 to get 25

Multiply 12 by 10 to get

 

25 x 12 = 300

 

Divide 300 by 10 to get 30

  • Question 3

Calculate:

9.76 × 45 = _________

 

CORRECT ANSWER
439.2
EDDIE SAYS

Multiply 2.5 by 10 to get 25

Multiply 12 by 10 to get

 

25 x 12 = 300

 

Divide 300 by 10 to get 30

  • Question 4

Work out:

6.8 × 1.2 = _________

 

CORRECT ANSWER
8.16
EDDIE SAYS

Multiply 6.8 by 10 to get 68

Multiply 1.2 by 10 to get 12

 

68 x 12 = 816

 

Divide 816 by 100 to get 8.16

  • Question 5

Calculate:

1.94 × 2.1 = _________

 

CORRECT ANSWER
4.074
EDDIE SAYS

Multiply 1.94 by 100 to get 194

Multiply 2.1 by 10 to get 21

 

194 x 21 = 4074

 

Divide 300 by 1000 to get 4.074

  • Question 6

Work out:

9.08 × 908 = _________

 

CORRECT ANSWER
8244.64
EDDIE SAYS

Multiply 9.08 by 100 to get 908

 

908 x 908 = 824464

 

 

Divide 842464 by 100 to get 8244.64

  • Question 7

Work out:

4.11 × 4.1 = _________

 

CORRECT ANSWER
16.851
EDDIE SAYS

Multiply 4.11 by 100 to get 411

Multiply 4.1 by 10 to get 41

 

411 x 41 = 16851

 

Divide 16851 by 1000 to get 16.851

  • Question 8

Calculate:

5.05 × 505 = _________

CORRECT ANSWER
2550.25
EDDIE SAYS

 

Multiply 5.05 by 100 to get 505

 

505 x 505 = 255025

 

Divide 255025 by 100 to get 2550.25

  • Question 9

Work out:

3.04 × 304 = _________

 

CORRECT ANSWER
924.16
EDDIE SAYS

Multiply 3.04 by 100 to get 304

 

304 x 304 = 92416

 

Divide 92416 by 100 to get 924.16

  • Question 10

Calculate:

3.04 × 3.04 = _________

 

CORRECT ANSWER
9.2416
EDDIE SAYS

Multiply 3.04 by 100 to get 304

 

304 x 304 = 92416

 

Divide 92416 by 10000 to get 9.2416

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